US7922209B1
Active / In Force
US
⏱️ 0.1 years remaining
Metamerism-based security patterns
Assignee: Hewlett Packard Development Co LP
•
Filing: 2006-12-22
•
Granted: 2011-04-12
•
Expires: 2026-12-22
Abstract
Abstract An article bears an HVS-perceivable security pattern based on metamerism. The metamerism causes the security pattern to be perceived differently when viewed under two different light sources.
Inventors
- 👤 Giordano Bruno Beretta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:02
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/36; B42D25/378; B42D25/20; B42D25/29; G; G07; G07D; G07D7/00; G07D7/06; G07D7/12; G07D7/1205; B42D2035/24; B42D2035/26; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
65 words
An article bearing a human-perceivable security pattern based on metamerism, wherein the metamerism causes the security pattern to be perceived differently when viewed under two different light sources, wherein the security pattern has a frame surrounding a region, and wherein a perceived depth of the region varies depending upon which of two different light emitted by the two different light sources illuminates the security pattern.
Claim 2
Dependent Claim
65 words
An article bearing a human-perceivable security pattern based on metamerism, wherein the metamerism causes the security pattern to be perceived differently when viewed under two different light sources, wherein the security pattern has a frame surrounding a region, and wherein a perceived depth of the region varies depending upon which of two different light emitted by the two different light sources illuminates the security pattern.
Claim 3
Dependent Claim
12 words
The article of claim 1 , wherein the security pattern is ink-based.
Claim 4
Independent Claim
120 words
A method of performing counterfeit detection on an article having a security pattern, comprising: alternating between a first light source and a second, different light source to illuminate the security pattern on the article, wherein the first light source emits first light, and the second light source emits second light, and wherein the first and second light sources are separate from the article; and causing the security pattern to have different perceived appearances when the security pattern is alternately illuminated with the first and second light sources, wherein the security pattern has a frame surrounding a region, and wherein a perceived depth of the region varies depending upon which of the first and second light sources illuminates the security pattern.
Claim 5
Independent Claim
120 words
A method of performing counterfeit detection on an article having a security pattern, comprising: alternating between a first light source and a second, different light source to illuminate the security pattern on the article, wherein the first light source emits first light, and the second light source emits second light, and wherein the first and second light sources are separate from the article; and causing the security pattern to have different perceived appearances when the security pattern is alternately illuminated with the first and second light sources, wherein the security pattern has a frame surrounding a region, and wherein a perceived depth of the region varies depending upon which of the first and second light sources illuminates the security pattern.
Claim 6
Independent Claim
101 words
A method of performing counterfeit detection on an article having a security pattern, comprising: viewing the article under a first light source that includes a liquid crystal display of a mobile device, and viewing the article under a second, different light source that emits light, wherein counterfeiting is suspected if the security pattern appears the same under both the first and second light sources, wherein the security pattern is based on metamerism that causes a region within a frame of the security pattern to be perceived to have different depths when alternately viewed under the first and second different light sources.
Claim 7
Independent Claim
101 words
A method of performing counterfeit detection on an article having a security pattern, comprising: viewing the article under a first light source that includes a liquid crystal display of a mobile device, and viewing the article under a second, different light source that emits light, wherein counterfeiting is suspected if the security pattern appears the same under both the first and second light sources, wherein the security pattern is based on metamerism that causes a region within a frame of the security pattern to be perceived to have different depths when alternately viewed under the first and second different light sources.
Claim 8
Dependent Claim
92 words
Anti-counterfeiting apparatus for printing human-perceivable security patterns on articles, the security patterns based on metamerism, wherein the metamerism causes each security pattern to be perceived differently when viewed under two different external light sources that emit light, wherein the anti-counterfeiting apparatus has a processor to generate the security patterns for printing on the articles, wherein at least one of the security patterns has a frame surrounding a region, wherein a perceived depth of the region varies depending upon which of the two different light sources illuminates the at least one security pattern.
Claim 9
Dependent Claim
92 words
Anti-counterfeiting apparatus for printing human-perceivable security patterns on articles, the security patterns based on metamerism, wherein the metamerism causes each security pattern to be perceived differently when viewed under two different external light sources that emit light, wherein the anti-counterfeiting apparatus has a processor to generate the security patterns for printing on the articles, wherein at least one of the security patterns has a frame surrounding a region, wherein a perceived depth of the region varies depending upon which of the two different light sources illuminates the at least one security pattern.
Claim 10
Dependent Claim
14 words
The apparatus of claim 5 , wherein the apparatus is a digital printing press.
Claim 11
Dependent Claim
48 words
The article of claim 1 , wherein the frame is perceived as transparent if a first of the two different light sources illuminates the security pattern, and a predetermined pattern of the frame becomes visible if a second of the two different light sources illuminates the security pattern.
Claim 12
Dependent Claim
14 words
The article of claim 7 , wherein the predetermined pattern is a checkerboard pattern.
Claim 13
Dependent Claim
162 words
An article bearing a human-perceivable security pattern based on metamerism, wherein the metamerism causes the security pattern to be perceived differently when viewed under two different light sources, wherein the security pattern is perceived to have a first pattern when the security pattern is illuminated by light emitted by a first of the light sources having a first spectral distribution with a relatively sharp peak in radiant power in a particular wavelength range, and wherein the security pattern is perceived to have a second pattern when the security pattern is illuminated by light from a second of the light sources having a second spectral distribution different from the first spectral distribution, wherein the metamerism is used to hide details of a structure in the security pattern, wherein the structure surrounds a region of the security pattern, and wherein a perceived depth of the surrounded region varies as a light source illuminating the security pattern alternate between the first and second light sources.
Claim 14
Dependent Claim
162 words
An article bearing a human-perceivable security pattern based on metamerism, wherein the metamerism causes the security pattern to be perceived differently when viewed under two different light sources, wherein the security pattern is perceived to have a first pattern when the security pattern is illuminated by light emitted by a first of the light sources having a first spectral distribution with a relatively sharp peak in radiant power in a particular wavelength range, and wherein the security pattern is perceived to have a second pattern when the security pattern is illuminated by light from a second of the light sources having a second spectral distribution different from the first spectral distribution, wherein the metamerism is used to hide details of a structure in the security pattern, wherein the structure surrounds a region of the security pattern, and wherein a perceived depth of the surrounded region varies as a light source illuminating the security pattern alternate between the first and second light sources.
Claim 15
Independent Claim
147 words
A method of performing counterfeit detection on an article having a security pattern, comprising: alternating between a first light source and a second, different light source to illuminate the security pattern on the article; and causing the security pattern to have different perceived appearances when the security pattern is alternately illuminated with the first and second light sources, wherein the security pattern has a frame surrounding a region, and wherein a perceived depth of the region varies depending upon which of the first and second light sources illuminates the security pattern, wherein alternating between the first and second light sources comprises alternating between: the first light source that emits light having a first spectral distribution with a relatively sharp peak in radiant power in a particular wavelength range, and the second light source that emits light having a second spectral distribution different from the first spectral distribution.
Claim 16
Independent Claim
147 words
A method of performing counterfeit detection on an article having a security pattern, comprising: alternating between a first light source and a second, different light source to illuminate the security pattern on the article; and causing the security pattern to have different perceived appearances when the security pattern is alternately illuminated with the first and second light sources, wherein the security pattern has a frame surrounding a region, and wherein a perceived depth of the region varies depending upon which of the first and second light sources illuminates the security pattern, wherein alternating between the first and second light sources comprises alternating between: the first light source that emits light having a first spectral distribution with a relatively sharp peak in radiant power in a particular wavelength range, and the second light source that emits light having a second spectral distribution different from the first spectral distribution.
Claim 17
Dependent Claim
40 words
The method of claim 3 , wherein the frame is perceived as transparent if the first light source illuminates the security pattern, and a predetermined pattern of the frame becomes visible if the second light source illuminates the security pattern.
Claim 18
Dependent Claim
14 words
The method of claim 11 , wherein the predetermined pattern is a checkerboard pattern.
Claim 19
Independent Claim
141 words
A method of performing counterfeit detection on an article having a security pattern, comprising: viewing the article under a first light source that includes a liquid crystal display of a mobile device, and viewing the article under a second, different light source, wherein counterfeiting is suspected if the security pattern appears the same under both the first and second light sources, wherein the security pattern is based on metamerism that causes a region within a frame of the security pattern to be perceived to have different depths when alternately viewed under the first and second different light sources, wherein: the first light source emits light having a first spectral distribution with a relatively sharp peak in radiant power in a particular wavelength range, and the second light source emits light having a second spectral distribution different from the first spectral distribution.
Claim 20
Independent Claim
141 words
A method of performing counterfeit detection on an article having a security pattern, comprising: viewing the article under a first light source that includes a liquid crystal display of a mobile device, and viewing the article under a second, different light source, wherein counterfeiting is suspected if the security pattern appears the same under both the first and second light sources, wherein the security pattern is based on metamerism that causes a region within a frame of the security pattern to be perceived to have different depths when alternately viewed under the first and second different light sources, wherein: the first light source emits light having a first spectral distribution with a relatively sharp peak in radiant power in a particular wavelength range, and the second light source emits light having a second spectral distribution different from the first spectral distribution.
Claim 21
Dependent Claim
48 words
The apparatus of claim 5 , wherein the frame is perceived as transparent if a first of the two different light sources illuminates the security pattern, and a predetermined pattern of the frame becomes visible if a second of the two different light sources illuminates the security pattern.
References Cited (Backward Citations)
US1612791A
Cited
US3752073A
Cited
US4820163A
Cited
US5473439A
Cited
US5670005A
Cited
US20020030360A1
Cited
US6198545B1
Cited
US6249588B1
Cited
US5995638A
Cited
US6819775B2
Cited
US6467810B2
Cited
EP1073257A1
Cited
US20030161017A1
Cited
US20030026500A1
Cited
US20030021437A1
Cited
US20050052705A1
Cited
US20030043424A1
Cited
FR2838201A1
Cited
US7180524B1
Cited
US20040076310A1
Cited
US7090913B2
Cited
US20040233463A1
Cited
US20050067497A1
Cited
US7246754B2
Cited
US20070110271A1
Cited
US20090027415A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2014-04-11 | 2014-10-11 | 2015-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2018-04-11 | 2018-10-11 | 2019-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2022-04-11 | 2022-10-11 | 2023-04-12 | $7700.00 | Window Closed / Lapsed |